Hi Stephen, I love your patch! Yet something to improve: [auto build test ERROR on 26291c54e111ff6ba87a164d85d4a4e134b7315c] url: https://github.com/0day-ci/linux/commits/Stephen-Boyd/Input-HID-Consolidate-ChromeOS-Vivaldi-keyboard-logic/20220205-042211 base: 26291c54e111ff6ba87a164d85d4a4e134b7315c config: s390-randconfig-r014-20220130 (https://download.01.org/0day-ci/archive/20220205/202202051134.yIxi48BD-lkp@xxxxxxxxx/config) compiler: s390-linux-gcc (GCC) 11.2.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/0day-ci/linux/commit/83759eb892fd16fd0bb7ff4bb0c4baa4e7a0283e git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Stephen-Boyd/Input-HID-Consolidate-ChromeOS-Vivaldi-keyboard-logic/20220205-042211 git checkout 83759eb892fd16fd0bb7ff4bb0c4baa4e7a0283e # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=s390 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): s390-linux-ld: drivers/dma/idma64.o: in function `idma64_platform_probe': idma64.c:(.text+0x1336): undefined reference to `devm_ioremap_resource' s390-linux-ld: drivers/input/vivaldi-keymap.o: in function `vivaldi_hid_feature_mapping': >> (.text+0x13e): undefined reference to `hid_alloc_report_buf' >> s390-linux-ld: (.text+0x18c): undefined reference to `hid_hw_raw_request' >> s390-linux-ld: (.text+0x1e8): undefined reference to `hid_report_raw_event' --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx